通过调节母体mRNA的储存和清除,LSM14B对卵细胞中介成熟至关重要
Yanling Wan1,2,3,4, Shuang Yang5, Tongtong Li1,2,3,4
1Center for Reproductive Medicine, Shandong University, Jinan, Shandong 250012, China.
Nucleic acids research
|October 27, 2023
概括
在卵细胞生长过程中,LSM14B对存储母体mRNA在线粒体关联核糖蛋白域 (MARDO) 中至关重要. 它的缺失会扰乱mRNA清除,通过阻断介质成熟,导致女性不孕.
科学领域:
- 生殖生物学 生殖生物学
- 分子细胞生物学 分子细胞生物学
- 卵细胞发育 卵细胞发育
背景情况:
- 完全成长的卵细胞在转录上是无声的,依赖于存储的母体信使RNA (mRNA).
- 母亲的mRNA被隔离在一个称为线粒体关联核糖蛋白域 (MARDO) 的结构中.
- 马尔多在卵细胞成熟过程中的确切成分和作用在很大程度上是未知的.
研究的目的:
- 研究LSM14B在MARDO的组装和动态中的功能.
- 阐明MARDO在母体mRNA储存和卵细胞成熟过程中的清除中的作用.
- 确定LSM14B缺乏对卵细胞介质进展和女性生育能力的影响.
主要方法:
- 使用LSM14B淘汰赛小鼠模型.
- 使用分子生物学技术分析了卵细胞中的mRNA储存和清除.
- 通过显微镜观察卵细胞的介质成熟和MARDO组合.
主要成果:
- 在卵细胞生长和介质成熟过程中,LSM14B淘汰会破坏MARDO组合.
- 丢失LSM14B损害了关键的母性mRNAs的存储和及时清除,包括Cyclin B1和Btg4.
- 缺少LSM14B的卵细胞未能进入二次半变,导致女性不孕.
结论:
- LSM14B对于MARDO组装至关重要,确保适当的母体mRNA管理.
- 由LSM14B调节的MARDO介导的mRNA清除对于成功的卵细胞中介成熟至关重要.
- 这一过程的中断导致女性不孕.
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